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AD5934 Datasheet(PDF) 2 Page - Analog Devices

Part No. AD5934
Description  250 kSPS, 12-Bit Impedance Converter, Network Analyzer
Download  32 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5934 Datasheet(HTML) 2 Page - Analog Devices

 
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AD5934
Rev. 0 | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Specifications..................................................................................... 3
I2C Serial Interface Timing Characteristics .................................. 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Descriptions.............................................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 10
System Description......................................................................... 11
Transmit Stage............................................................................. 12
Frequency Sweep Command Sequence................................... 13
Receive Stage ............................................................................... 13
DFT Operation ........................................................................... 13
Impedance Calculation .................................................................. 14
Magnitude Calculation .............................................................. 14
Gain Factor Calculation ............................................................ 14
Impedance Calculation Using Gain Factor............................. 14
Gain Factor Variation with Frequency .................................... 14
Two-Point Calibration ............................................................... 15
Two-Point Gain Factor Calculation ......................................... 15
Gain Factor Setup Configuration............................................. 15
Gain Factor Recalculation ......................................................... 15
Gain Factor Temperature Variation......................................... 16
Impedance Error ........................................................................ 16
Performing a Frequency Sweep .................................................... 18
Register Map ................................................................................... 19
Control Register ......................................................................... 19
Start Frequency Register ........................................................... 20
Frequency Increment Register.................................................. 20
Number of Increments Register ............................................... 21
Number of Settling Time Cycles Register ............................... 21
Status Register............................................................................. 22
Real and Imaginary Data Registers (16 Bits).......................... 22
Serial Bus Interface......................................................................... 23
General I2C Timing.................................................................... 23
Writing/Reading to the AD5934 .............................................. 24
Block Write.................................................................................. 24
AD5934 Read Operations ......................................................... 25
Typical Applications....................................................................... 26
Biomedical: Noninvasive Blood impedance Measurement .. 26
Sensor/Complex Impedance Measurement............................ 26
Electro-Impedance Spectroscopy............................................. 27
Choosing a Reference for the AD5934 ........................................ 28
Layout and Configuration............................................................. 29
Power Supply Bypassing and Grounding................................ 29
Outline Dimensions ....................................................................... 30
Ordering Guide .......................................................................... 30
REVISION HISTORY
6/05—Revision 0: Initial Version


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